From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/drivers/platform/x86/surfacepro3_button.c | 61 ++++++++++++++++++++++++++----
1 files changed, 52 insertions(+), 9 deletions(-)
diff --git a/kernel/drivers/platform/x86/surfacepro3_button.c b/kernel/drivers/platform/x86/surfacepro3_button.c
index 1b49169..d8afed5 100644
--- a/kernel/drivers/platform/x86/surfacepro3_button.c
+++ b/kernel/drivers/platform/x86/surfacepro3_button.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* power/home/volume button support for
* Microsoft Surface Pro 3/4 tablet.
*
* Copyright (c) 2015 Intel Corporation.
* All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
*/
#include <linux/kernel.h>
@@ -23,6 +19,12 @@
#define SURFACE_PRO4_BUTTON_HID "MSHW0040"
#define SURFACE_BUTTON_OBJ_NAME "VGBI"
#define SURFACE_BUTTON_DEVICE_NAME "Surface Pro 3/4 Buttons"
+
+#define MSHW0040_DSM_REVISION 0x01
+#define MSHW0040_DSM_GET_OMPR 0x02 // get OEM Platform Revision
+static const guid_t MSHW0040_DSM_UUID =
+ GUID_INIT(0x6fd05c69, 0xcde3, 0x49f4, 0x95, 0xed, 0xab, 0x16, 0x65,
+ 0x49, 0x80, 0x35);
#define SURFACE_BUTTON_NOTIFY_TABLET_MODE 0xc8
@@ -82,28 +84,28 @@
/* Power button press,release handle */
case SURFACE_BUTTON_NOTIFY_PRESS_POWER:
pressed = true;
- /*fall through*/
+ fallthrough;
case SURFACE_BUTTON_NOTIFY_RELEASE_POWER:
key_code = KEY_POWER;
break;
/* Home button press,release handle */
case SURFACE_BUTTON_NOTIFY_PRESS_HOME:
pressed = true;
- /*fall through*/
+ fallthrough;
case SURFACE_BUTTON_NOTIFY_RELEASE_HOME:
key_code = KEY_LEFTMETA;
break;
/* Volume up button press,release handle */
case SURFACE_BUTTON_NOTIFY_PRESS_VOLUME_UP:
pressed = true;
- /*fall through*/
+ fallthrough;
case SURFACE_BUTTON_NOTIFY_RELEASE_VOLUME_UP:
key_code = KEY_VOLUMEUP;
break;
/* Volume down button press,release handle */
case SURFACE_BUTTON_NOTIFY_PRESS_VOLUME_DOWN:
pressed = true;
- /*fall through*/
+ fallthrough;
case SURFACE_BUTTON_NOTIFY_RELEASE_VOLUME_DOWN:
key_code = KEY_VOLUMEDOWN;
break;
@@ -146,6 +148,44 @@
}
#endif
+/*
+ * Surface Pro 4 and Surface Book 2 / Surface Pro 2017 use the same device
+ * ID (MSHW0040) for the power/volume buttons. Make sure this is the right
+ * device by checking for the _DSM method and OEM Platform Revision.
+ *
+ * Returns true if the driver should bind to this device, i.e. the device is
+ * either MSWH0028 (Pro 3) or MSHW0040 on a Pro 4 or Book 1.
+ */
+static bool surface_button_check_MSHW0040(struct acpi_device *dev)
+{
+ acpi_handle handle = dev->handle;
+ union acpi_object *result;
+ u64 oem_platform_rev = 0; // valid revisions are nonzero
+
+ // get OEM platform revision
+ result = acpi_evaluate_dsm_typed(handle, &MSHW0040_DSM_UUID,
+ MSHW0040_DSM_REVISION,
+ MSHW0040_DSM_GET_OMPR,
+ NULL, ACPI_TYPE_INTEGER);
+
+ /*
+ * If evaluating the _DSM fails, the method is not present. This means
+ * that we have either MSHW0028 or MSHW0040 on Pro 4 or Book 1, so we
+ * should use this driver. We use revision 0 indicating it is
+ * unavailable.
+ */
+
+ if (result) {
+ oem_platform_rev = result->integer.value;
+ ACPI_FREE(result);
+ }
+
+ dev_dbg(&dev->dev, "OEM Platform Revision %llu\n", oem_platform_rev);
+
+ return oem_platform_rev == 0;
+}
+
+
static int surface_button_add(struct acpi_device *device)
{
struct surface_button *button;
@@ -158,6 +198,9 @@
strlen(SURFACE_BUTTON_OBJ_NAME)))
return -ENODEV;
+ if (!surface_button_check_MSHW0040(device))
+ return -ENODEV;
+
button = kzalloc(sizeof(struct surface_button), GFP_KERNEL);
if (!button)
return -ENOMEM;
--
Gitblit v1.6.2